Power transmission



ay 26, 1942 o. w. scHo'rz 2,284,233.

POWER TRANSMISSION Filed Feb. 6; 1941 INVENTOR fig 144 54%021. v

- ATTORNEYS.

Patented May as, 1942 UNT rower. TRANSMISSION NT OFFICE Otto W. Schotz,Detroit, Mich, assignor to Chrysler Corporation, Highland Park, Mich, acorporation of Delaware Application February 6, 1941, Serial No. 377,597

(Cl. Me-333) 7 Claims.

This invention relates to power transmissions and more particularly toan improved driving sys-' tem for a motor vehicle. 7

An object of the invention is the provision of a mechanism of theforegoing characterized by the improved design and. operation of thespeed ratio drive control means and particularly toprovide an improvedrelationship of the gearing and clutch means constituting the speedratio drive control means.

Another object of the invention is the provision of a simple and compactarrangement of speed ratio drive control means such that the same can beaccommodated in a relatively small space.

A still further object of the invention is the or gear I2- is acountershaft gear 23 having an axial sleeve 24 telescoping acorresponding sleeve 25 of .a cluster gear, generally indicated at 26,the latter being mounted on a countershaft 21. The cluster gear 25'includes the gear 28 in constant mesh with the gear l6 and a gear 29.The gear 23 is operatively connected with the cluster gear 26 by afree-wheeling clutch 30 which is operable to drive from the gear 23tothe cluster gear 26 and to accommodate overrunning of the latter withrespect to the former as will be here inafter apparent fromthe'description of operation. f I

A reverse idler 3| is rotatably mounted on a shaft 32 and shiftableaxially thereon tomesh with the gear 29' at the same time meshing withthe gear l8 drivingly carried by the torque output shaft l3, the idler3I'normally meshing with the gear l8 except when. the latter is shifted]axially to the right, as viewed in Fig. 1, to mesh with the gear 29.

During operation of the direct drive as heretofore described, the clutch30 accommodates over- 7 running of thecluster gear 26 with respect tothe gear 23. When the parts are in the'neutral position as illustrated,the drive from'the shaft ll date overrunning action of the countershaftward end portion of the torque output shaft i3 is suitably journalled.Driven with the pinion is transmitted from the main drive pinion I2 tothe gear 23, and through the clutch 30 to the cluster gear 26'. The low'speed drive is obtained by shifting the gear [8 to the right as viewedin;

Fig. 1. to mesh with the gear'29, it being understood that the gear. I8is thereby released from 12 is a set of clutch teeth l5 adapted to meshwith-a sleeve l5 splined on the gear It for axial shift, a blockermember llpreventing clutching engagement of the sleeve I5 with teeth I4until the speeds of rotation thereof are approximately; synchronized.The gear I6 is journalled on the shaft 13 and suitably maintainedagainst axial movement.

the gear HS, in response to axial Shift of the gear l8 to the left asviewed in Fig. 1. The sleeve 15 is-shifted by a yoke 2| while the gear[8 is shifted by a yoke 22. It will be understood that when the sleeveis clutched with the teeth 14 and the sets of teeth 19 and Zilareclutched there is provided a direct drive between the shafts l I and i3.In constantmesh with the main drive pinion the reverse idler 32. Withthe parts in their illustrated positions, the reverse drive is obtainedby shifting the idler 3| to-the right as viewed in Fig.1 to meshlwiththe gear .29 it being. understood that the idler: 3i is also meshed withthe gear l8. Third or'high is obtained by shift of the gear I8 from theposition shown to clutch the sets of teeth l9 and 20 whereupon the drivepassing from the pinion l 2 as aforesaidto the, cluster. gear 26 andfrom the latter through the gear '28, to the gear l5 and through theteeth i9, 211 to gear 18.. Y f

I claim: V 1'. In a power transmitting mechanism. including a torqueinput gear and a. driven gear coaxial therewith, sets of clutch teethrespectively dliV-J en with said gears,- asleeve driven with said driven gear and shiftable axially to clutch. with the v set'of clutch teethdriven with said input gear;

cOuntershaft gearing including a first gear in constantmesh withxsaidinput fgear a second clutch between said first and secondj gears. ac--'commodatingrelative rotation thereof when 7 said sleeve isclutched withsaid set of clutch teeth" 7 .asaforesaidf a torque output shaft, :anaxially shiftable gear driven with said shaft, a set of g clutch teethdriven with the last mentionedgear adapted to clutch with the set ofclutch teeth driven with said driven gear in response to shift of saidaxially shiftable gear in one direction, said axially shiftablepgearbeing shiftable in an- 2,2e4,2ss

other direction to mesh with said, countershaft, 7

third gear; and a reverse idler shiftable'axially to operably connectsaid axially shiftable gear and said countershaft third gear when thelatter,

shiftable gear; a countershaft gear in constant mesh with saidstationary gear, means operable to establish'a direct drive between saidinput member and said stationary gear, drive means including a one waydrive clutch operable to drive said countershaft gear from said inputdriver 7 when the first mentioned means is inoperative whereby saidstationary gear is driven by said countershaft gear, a secondcountershaft gear driven from the first mentioned countershaft gear andadapted to mesh with saidaxially shiftable gearwhen said sets of clutchteeth are declutched, and a reverse idler shiftable to connect thesecond mentioned'countershaft gear and said axially shiftable gear. 7

3. In a power transmitting mechanism including a torque input driver anda torque output shaft, coaxialigears one axially stationary and theother drivingly mountedon said shaft for axial shift, sets of clutchteeth respectively driven with said coaxial gears adapted for clutchingengagement in, response to axial shift of said shiftable gear, meansoperable 'to establish a direct drive between said input driver and saidstationary gear, countershaft gearing means in ing a torque "inputmember and a torque output shaft adapted to be drivinglyconnected'therewith, a set of :clutch teeth driven with said member,a'pair of coaxial gears, one axially stationary andthe other thereofdrivinglysecured to said shaft and adapted for axial-shift, sets .of

clutch teeth respectively'driven with said coaxial gears adapted forclutching engagement in response to axial. shift of said shiftable gear,a sleeve driven with said stationary gear and shiftable to clutch withthe teeth of said input memshiftable to connect said axially shiftablegear 7 and said countershaft gearing when said sets of clutch teeth aredeclutched, and a one way drive clutch operable to release the drivefrom said countershaft gearing to said stationary gearing duringoperation of said direct drive.

5. In a power transmitting mechanism including a torque input member anda torque output shaft, an axially shiftable gear drivingly mounted onsaid shaft, an axially stationary gear coaxial with said gear, sets ofclutch teeth respectively driven from said gears adapted for clutchingengagement in response to shift of said axially shiftable gear toestablish a direct drive between said stationary gear and said shaft,means operable to establish a direct drive between said; input memberand said stationary gear,

countershaft gearing driven'from said input member operable to drivesaid stationary gear when said means is inoperative to establish thedirect drive as aforesaid, said shiftable gear being shiftable tomeshwith said countershaft gearing when saidsets of teeth aredeclutched,

a reverse idler shiftable to operably connect said countershaft gearingand said axially shiftable gear, and an overrunning device operable torelease said countershaft gearing drive when said means is operable toestablish said direct drive.

6. In a power transmitting mechanism including torque input" and outputmembers, an axially shiftable geardrivingly secured to said outputmember, an axiallystationary gear coaxial with said gear, means operable,in'response to shift 7 of said axially shiftable gear for establishinga direct-drive between saideoaxial gears, means operable to establishadirect drive between said input member and said stationary gear,countershaft gearing driven from said input member operable to drivesaid stationary gear when the second mentioned means is inoperative toestablish the direct drive as aforesaid, a reverse idler shiftabletooperably connect said countershaft gearing and'saidshiftable gear, and aone way drive clutch operable to release said countershaft gearing drivewhen said "second'mentioned means is inoperative to establish saiddirect drive.

7. In a power, transmitting mechanism includ-, ing torqueinput' andoutput members, anaxially shiftable gear drivingly secured to saidoutput member," an axially stationary gear coaxial with said gear,"means-operablein response to shift of said axiallyshiftable gear,for-establishing a direct I drive 1 between said coaxial gears," meansoperable to establish adirect drive between said input member and saidstationary gear; 'counter shaft'gearing ineludinga first gear inconstant mesh. with saidiinputmember, a second gear in constant; mesh;with saidstationary gear, and a third gear, said countershaft gearingbeing operable toi drive i said stationary gear when the secondmentioned meansis inoperative to 'establishthe direct driveas aforesaid;a one-way drive clutchoperable' to 'release'the drive between said herwhereby to establish adire'ct drive between 7 said member and said shaftwhen said sets of teeth are clutched together, countershaftgearingdriven from'said input member operable to drive said stationarygearlwhenr gsaidi sleeve is declutched from thefirst mentioned set ofclutch first and second countershaft gears when said second mentionedmeans is inoperative to establish said direct drive, said shiftable gearbeing shiftable to mesh withsaid countershaftthird gear whenisaid first.mentioned means is inoperative, and-an idler, shiftable axially toestablish teeth, saidshiftable niember being shiftable to' m'eshfwithTsaid countershaft gearing when said sets oficlutchteeth-aredeclutehed;aireverse. idler.

